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Dec 30th, 2023
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 Mercury Motor Question Please help!!
#7974665
09/10/12 12:35 AM
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Joined: Aug 2010
Posts: 579
canyonking/Lake Fork Guide
OP
Pro Angler
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OP
Pro Angler
Joined: Aug 2010
Posts: 579 |
Hey guys imlooking for a little help here, I have a 2003 merc 250XB motor and I keep blowing up the alternator! My cranking battery is less than a yr old. Please help! Any Ideas at what might cause this?? Thanks Ron
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 Re: Mercury Motor Question Please help!!
[Re: canyonking/Lake Fork Guide]
#7974795
09/10/12 01:05 AM
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Joined: Jun 2004
Posts: 1,509
OPTI
Extreme Angler
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Extreme Angler
Joined: Jun 2004
Posts: 1,509 |
Yes sir do you know for sure the alternator is bad or is just not charging the cranking battery. 2003 models have a 100 amp fusible link that runs from the positive lug on alternator to the starter solenoid and if this is blown it will not charge the battery. Check the voltage at the positive lug at alternator for battery voltage if there is no voltage then the link is blown and that requires the replacement of the complete link wire.....OPTI
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Re: Mercury Motor Question Please help!!
[Re: canyonking/Lake Fork Guide]
#7980520
09/11/12 02:43 PM
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Joined: Dec 2002
Posts: 3,832
Tommy Yetts
TFF Team Angler
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TFF Team Angler
Joined: Dec 2002
Posts: 3,832 |
We have seen some of the 3.0 litre blocks have a porosity in them allowing water to spray in the alternator killing them. Might be something to look for.
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